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Fri, 23 May 2025 03:26:06 -0700 (PDT) Received: from localhost.localdomain ([119.8.44.69]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-233f3e046bbsm8181845ad.50.2025.05.23.03.26.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 May 2025 03:26:06 -0700 (PDT) From: Han Gao To: linux-riscv@lists.infradead.org, Han Gao Cc: Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Charlie Jenkins , Andy Chiu , Jesse Taube , Conor Dooley , Xiongchuan Tan , linux-kernel@vger.kernel.org Subject: [PATCH v2] riscv: vector: Fix context save/restore with xtheadvector Date: Fri, 23 May 2025 18:25:56 +0800 Message-ID: <9b9eb2337f3d5336ce813721f8ebea51e0b2b553.1747994822.git.rabenda.cn@gmail.com> X-Mailer: git-send-email 2.47.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Previously only v0-v7 were correctly saved/restored, and the context of v8-v31 are damanged. Correctly save/restore v8-v31 to avoid breaking userspace. Fixes: d863910eabaf ("riscv: vector: Support xtheadvector save/restore") Signed-off-by: Han Gao Tested-by: Xiongchuan Tan Reviewed-by: Charlie Jenkins Reviewed-by: Andy Chiu Reviewed-by: Yanteng Si --- Changes in v2: Add fix tag Improve commit mesage v1: https://lore.kernel.org/linux-riscv/c221c98dc2369ea691e3eb664bf084dc909= 496f6.1747934680.git.rabenda.cn@gmail.com/ arch/riscv/include/asm/vector.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/riscv/include/asm/vector.h b/arch/riscv/include/asm/vecto= r.h index e8a83f55be2b..7df6355023a3 100644 --- a/arch/riscv/include/asm/vector.h +++ b/arch/riscv/include/asm/vector.h @@ -200,11 +200,11 @@ static inline void __riscv_v_vstate_save(struct __ris= cv_v_ext_state *save_to, THEAD_VSETVLI_T4X0E8M8D1 THEAD_VSB_V_V0T0 "add t0, t0, t4\n\t" - THEAD_VSB_V_V0T0 + THEAD_VSB_V_V8T0 "add t0, t0, t4\n\t" - THEAD_VSB_V_V0T0 + THEAD_VSB_V_V16T0 "add t0, t0, t4\n\t" - THEAD_VSB_V_V0T0 + THEAD_VSB_V_V24T0 : : "r" (datap) : "memory", "t0", "t4"); } else { asm volatile ( @@ -236,11 +236,11 @@ static inline void __riscv_v_vstate_restore(struct __= riscv_v_ext_state *restore_ THEAD_VSETVLI_T4X0E8M8D1 THEAD_VLB_V_V0T0 "add t0, t0, t4\n\t" - THEAD_VLB_V_V0T0 + THEAD_VLB_V_V8T0 "add t0, t0, t4\n\t" - THEAD_VLB_V_V0T0 + THEAD_VLB_V_V16T0 "add t0, t0, t4\n\t" - THEAD_VLB_V_V0T0 + THEAD_VLB_V_V24T0 : : "r" (datap) : "memory", "t0", "t4"); } else { asm volatile ( --=20 2.47.2